Contrary to the Mayan calendar, which had Dec. 21, 2012, penciled in as the day everything was to go ka-boom, we’re all still all here.

But at the movies, the apocalypse is now.

Take a look through the films premiering between this weekend — when “Iron Man 3” explodes on a zillion screens, kick-starting Hollywood’s summer season — and Labor Day weekend. Doom and gloom are everywhere, from global holocaust to alien invasions to putting Jay Gatsby and Jay-Z in the same movie.

Here are some of the anticipated biggies — and some of the smaller, quieter films. As always, dates are subject to change.

“Iron Man 3” (today): Can a new director — with an ’80s action-screenwriting pedigree — keep the Robert Downey-in-a-titanium-alloy-suit franchise going? Jon Favreau, who helmed the first two “IMs,” is out, and Shane Black of “Lethal Weapon” fame is in. So is Ben Kingsley, as maniac villain Mandarin. Tony Stark, the billionaire industrialist with the high-tech, heavy-metal get-up, has to save a bunch of people, including Gwyneth Paltrow (his gal Friday, aka Pepper Potts). The film got off to a terrific start last week overseas, finishing at No. 1 in 42 countries and collecting more than $195 million. PG-13 (See the review on Page 5.)

“The Great Gatsby” (May 10): “It takes two to make an accident,” F. Scott Fitzgerald wrote in his Roaring Twenties novel. Let’s hope Aussie auteur Baz Luhrmann hasn’t made a gigantic, expensive accident with his 3-D, Jay-Z-soundtracked spectacle. The cast includes Leonardo DiCaprio (Gatsby), Carey Mulligan (Daisy) and Tobey Maguire (Nick Carraway). This is the fourth adaptation of the 1925 classic, the fifth if you count the 2000 TV movie, and none has pulled it off. PG-13

“Star Trek Into Darkness” (May 17): No punctuation, no “the,” just “Star Trek Into Darkness” — can’t get more streamlined than that. J.J. Abrams is back in the director’s chair, Chris Pine is back in the captain’s chair as Kirk, and Zoe Saldana (Uhuru), Zachary Quinto (Spock), Simon Pegg (Scotty) and Anton Yelchin (Chekhov) are all back on the Enterprise’s bridge. Benedict Cumberbatch is the new nemesis, although Trekker rumors abound that he actually is playing Khan, the wrathful superhuman of the 1982 “Star Trek” film. PG-13

“The Hangover Part III” (May 24): We know from the trailer that a giraffe meets a grisly end. And we know that Zach Galifianakis is just plain grisly. The third and promised final installment in the male-bonding screwball nightmare finds Bradley Cooper, Ed Helms, et al, back where it all began — in Las Vegas. And then they’re off to Tijuana and other places where the Wolfpack can run wild, and run amok. R

“Before Midnight” (May 24): Ethan Hawke and Julie Delpy pick up their “Before Sunrise” and “Before Sunset” partnership in Greece, where they reflect on what it means to be married, with kids. R

“After Earth” (May 31): Humankind has relocated to a new planet after an apocalypse lays ruin to Earth. But then Will and Jaden Smith, sometime in the 31st century, crash-land back on the old orb, now seemingly devoid of human life — except for moviemaker M. Night Shyamalan, telling the movie-star father-and-son duo what to do from his director’s chair. PG-13

“This Is the End” (June 12): Adapted from the short “Jay and Seth vs. The Apocalypse,” a squad of comedy stars — Seth Rogen, Jay Baruchel, Paul Rudd, Jason Segel, Michael Cera — head over to James Franco’s house for a giant party, then have to face the end of the world. If that’s not enough, they must content with Emma Watson (“Harry Potter”) wielding an ax. R

“Man of Steel” (June 14): Superman gets an epic reboot from Zac (“300”) Snyder, with Henry Cavill as the new Clark Kent, alias you-know-who, and the whole Krypton-to-Earth origin story retold. PG-13

“The Bling Ring” (June 14): Ripped from the headlines, the film stars Emma Watson and some other kids as a team of star-struck Angelenos who rob the homes of the rich and famous. Sofia Coppola directs. R

“Monsters University” (June 21): Pixar’s prequel to “Monsters, Inc.” finds Mike (voice of Billy Crystal) and Sulley (John Goodman) on a college campus, and not exactly the best of buds. Then the bromance begins. PG

“The Wolverine” (July 26): The sixth installment in “The X-Men” series finds Jean Valjean — make that Hugh Jackman — paying a visit to Japan, where the mutant with the retractable claws and the superhuman ability to heal himself meets up with the Silver Samurai and a wild bunch of Yakuzas. PG-13

“The Spectacular Now” (Aug. 2): Simi Valley actress Shailene Woodley, who earned raves for her performance in “The Descendents” with George Clooney, is earning similar praise for her work in this coming-of-age drama. The film, based on the Tim Tharp novel, was a hit at the Sundance Film Festival, where Woodley and co-star Miles Teller won the U. S. Dramatic Special Jury Award for Acting. Not yet rated

“Elysium” (Aug. 9): It’s the middle of the 22nd century, and the rich and powerful have moved on from the rubble and ruin of Earth to settle in a place with no war, poverty or disease. Which leaves everybody else to fight among themselves, until Matt Damon comes along to start some trouble. From Neill Blomkamp, director of another haves and have-nots sci-fi allegory, “District 9.” Not yet rated.

“Kick-Ass 2” (Aug. 16): Aaron Taylor-Johnson and Chloe Grace Moretz climb back into their tights and pull on their masks to reprise the roles of crime-fighting high-schoolers. Jim Carrey joins the fray. Not yet rated.